mkoffsets.sh 4.1 KB

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  1. # automatically compute structure offsets for gcc targets in ELF format
  2. # (C) 2018 Kai-Uwe Bloem. This work is placed in the public domain.
  3. #
  4. # usage: mkoffsets <output dir>
  5. CC=${CC:-gcc}
  6. # endianess of target (automagically determined below)
  7. ENDIAN=
  8. # compile with target C compiler and extract value from .rodata section
  9. compile_rodata ()
  10. {
  11. $CC $CFLAGS -I .. -c /tmp/getoffs.c -o /tmp/getoffs.o || exit 1
  12. # echo 'void dummy(void) { asm(""::"r" (&val)); }' >> /tmp/getoffs.c
  13. # $CC $CFLAGS -I .. -nostdlib -Wl,-edummy /tmp/getoffs.c \
  14. # -o /tmp/getoffs.o || exit 1
  15. # find the name of the .rodata section (in case -fdata-sections is used)
  16. rosect=$(readelf -S /tmp/getoffs.o | grep '\.rodata\|\.sdata' |
  17. sed 's/^[^.]*././;s/ .*//')
  18. # read out .rodata section as hex string (should be only 4 or 8 bytes)
  19. ro=$(readelf -x $rosect /tmp/getoffs.o | grep '0x' | cut -c14-48 |
  20. tr -d ' \n')
  21. if [ "$ENDIAN" = "le" ]; then
  22. # swap needed for le target
  23. hex=""
  24. for b in $(echo $ro | sed 's/\([0-9a-f]\{2\}\)/\1 /g'); do
  25. hex=$b$hex;
  26. done
  27. else
  28. hex=$ro
  29. fi
  30. # extract decimal value from hex string
  31. rodata=$(printf "%d" 0x$hex)
  32. }
  33. # determine member offset and create #define
  34. get_define () # prefix struct member member...
  35. {
  36. prefix=$1; shift
  37. struct=$1; shift
  38. field=$(echo $* | sed 's/ /./g')
  39. name=$(echo $* | sed 's/ /_/g')
  40. echo '#include "pico/pico_int.h"' > /tmp/getoffs.c
  41. echo "static const struct $struct p;" >> /tmp/getoffs.c
  42. echo "const int val = (char *)&p.$field - (char*)&p;" >>/tmp/getoffs.c
  43. compile_rodata
  44. line=$(printf "#define %-20s 0x%04x" $prefix$name $rodata)
  45. }
  46. if echo $CFLAGS | grep -qe -flto; then CFLAGS="$CFLAGS -fno-lto"; fi
  47. # determine endianess
  48. echo "const int val = 1;" >/tmp/getoffs.c
  49. compile_rodata
  50. ENDIAN=$(if [ "$rodata" -eq 1 ]; then echo be; else echo le; fi)
  51. # output header
  52. fn="${1:-.}/pico_int_offs.h"
  53. echo "/* autogenerated by mkoffset.sh, do not edit */" >$fn
  54. echo "/* target endianess: $ENDIAN, compiled with: $CC $CFLAGS */" >>$fn
  55. # output offsets
  56. get_define OFS_Pico_ Pico video reg ; echo "$line" >>$fn
  57. get_define OFS_Pico_ Pico m rotate ; echo "$line" >>$fn
  58. get_define OFS_Pico_ Pico m z80Run ; echo "$line" >>$fn
  59. get_define OFS_Pico_ Pico m dirtyPal ; echo "$line" >>$fn
  60. get_define OFS_Pico_ Pico m hardware ; echo "$line" >>$fn
  61. get_define OFS_Pico_ Pico m z80_reset ; echo "$line" >>$fn
  62. get_define OFS_Pico_ Pico m sram_reg ; echo "$line" >>$fn
  63. get_define OFS_Pico_ Pico sv ; echo "$line" >>$fn
  64. get_define OFS_Pico_ Pico sv data ; echo "$line" >>$fn
  65. get_define OFS_Pico_ Pico sv start ; echo "$line" >>$fn
  66. get_define OFS_Pico_ Pico sv end ; echo "$line" >>$fn
  67. get_define OFS_Pico_ Pico sv flags ; echo "$line" >>$fn
  68. get_define OFS_Pico_ Pico rom ; echo "$line" >>$fn
  69. get_define OFS_Pico_ Pico romsize ; echo "$line" >>$fn
  70. get_define OFS_Pico_ Pico est ; echo "$line" >>$fn
  71. get_define OFS_EST_ PicoEState DrawScanline ; echo "$line" >>$fn
  72. get_define OFS_EST_ PicoEState rendstatus ; echo "$line" >>$fn
  73. get_define OFS_EST_ PicoEState DrawLineDest ; echo "$line" >>$fn
  74. get_define OFS_EST_ PicoEState HighCol ; echo "$line" >>$fn
  75. get_define OFS_EST_ PicoEState HighPreSpr ; echo "$line" >>$fn
  76. get_define OFS_EST_ PicoEState Pico ; echo "$line" >>$fn
  77. get_define OFS_EST_ PicoEState PicoMem_vram ; echo "$line" >>$fn
  78. get_define OFS_EST_ PicoEState PicoMem_cram ; echo "$line" >>$fn
  79. get_define OFS_EST_ PicoEState PicoOpt ; echo "$line" >>$fn
  80. get_define OFS_EST_ PicoEState Draw2FB ; echo "$line" >>$fn
  81. get_define OFS_EST_ PicoEState HighPal ; echo "$line" >>$fn
  82. get_define OFS_PMEM_ PicoMem vram ; echo "$line" >>$fn
  83. get_define OFS_PMEM_ PicoMem vsram ; echo "$line" >>$fn
  84. get_define OFS_PMEM32x_ Pico32xMem pal_native ; echo "$line" >>$fn
  85. get_define OFS_SH2_ SH2_ is_slave ; echo "$line" >>$fn
  86. get_define OFS_SH2_ SH2_ p_bios ; echo "$line" >>$fn
  87. get_define OFS_SH2_ SH2_ p_da ; echo "$line" >>$fn
  88. get_define OFS_SH2_ SH2_ p_sdram ; echo "$line" >>$fn
  89. get_define OFS_SH2_ SH2_ p_rom ; echo "$line" >>$fn
  90. get_define OFS_SH2_ SH2_ p_dram ; echo "$line" >>$fn
  91. get_define OFS_SH2_ SH2_ p_drcblk_da ; echo "$line" >>$fn
  92. get_define OFS_SH2_ SH2_ p_drcblk_ram ; echo "$line" >>$fn